since you went to the trouble to point it out...

src/lua-engine.cpp

@@ -3393,15 +3393,6 @@ static int gui_savescreenshot(lua_State *L) {
 	return 1;
 }
 
-// gui.gdscreenshot()
-//
-//  Returns a screen shot as a string in gd's v1 file format.
-//  This allows us to make screen shots available without gd installed locally.
-//  Users can also just grab pixels via substring selection.
-//
-//  I think...  Does lua support grabbing byte values from a string?
-//  Well, either way, just install gd and do what you like with it.
-//  It really is easier that way.
 // gui.gdscreenshot()
 //
 //  Returns a screen shot as a string in gd's v1 file format.